To install Editor Config on Sublime Text all you need to do is to follow the following steps:-

Go the Preferences tab -> Package Control.

Select Install Package from the drop down menu.

Wait for the list to load, once it loads it will show you a list of packages.

Now, type in EditorConfig and select the highlighted option.

To confirm that Editor Config is installed correctly on your Sublime Text instance you can go to Preferences -> Browse Packages. If installed correctly you should be able to see an EditorConfig directory present in the Packages directory.